recent Canadian test report on stucco -- they endorsed a >product called
Siloxane

I'm a Canadian but have never used the stuff in the belief that is probably
more prudent to rely upon geometry rather than chemistry to protect a
building from moisture ... probably due in large part to my not knowing what
exactly the chemistry is and in another part, an innate fear of chemistry,
period . (Like, too many bum trips in the past, man.)

A number (well, three anyway) of questions arise .
(a) Is the stuff safe enough to drink (or indirectly
absorbed into the body when handling the stuff)?
I suspect not, but just how safe or dangerous is the
stuff compared to say, driving on an LA freeway in a
democrat ?
(aka "horse & buggy" for non Waterloo County folk)
Silicone sealers usually have a skull and crossbones
on the can so I'm guessing that siloxane sealers
wouldn't be cat tea ?
(b) It appears that different manufacturers supply
products of different concentrations.
What solution is best for the job of sealing plaster
on SB walls ?
Would 6% do or should one use 15% solution only ?
( ie Does concentration matter ?) Obviously the task
of sealing pavement which sees heavy traffic will
have different criteria than the task of sealing a
wall surface .
(c) Are some brand names preferable to others or is
checking the solution a good enough assurance that
the product will provide the protection desired ?
ie A person recently asked if Xypex was a siloxane.
(d) Of the three (siloxane, oligomeric polysiloxanes,
silanes) do we assume that siloxane is the better
choice in terms of performance and environmental
friendliness (and cost, I suppose) ?
If not, is there some reason (other than lack of
funding) why the other two weren't considered for
testing ?
(e) Is WatJohn the only person on this List who can
answer these questions ? If so, looks like WatJohn
could make some pretty serious ransom demands here.
--- * ---
Robert W. Tom
Kanata, Ontario, Canada rw_tom@...
please visit: http://www.theHungerSite.com daily
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